This paper estimates the elasticity of elephant poaching with respect to prices. To identify the supply curve, the authors observe that ivory is a storable commodity and hence subject to Hotelling's no-arbitrage condition. The price of gold, one of many commodities used as stores of value, is...

Transnational terrorist organizations such as the Islamic State group (also known as ISIS/ISIL or Daesh) have shown an ability to attract radicalized individuals from many countries to join their ranks. Using a novel data set that reports countries of residence and educational levels of a large...

This paper analyzes the spatial distribution of refugees over 1987–2017 and establishes several stylized facts about refugees today compared with past decades. Refugees still predominantly reside in developing countries neighboring their country of origin. However, compared to past decades,...

Utilities the world over grapple with how to set prices to recover fixed costs. This paper considers optimal utility provision and pricing when consumers form habits without being aware of it. Data from a multi-year pricing experiment among nearly 1500 rural piped water customers in Vietnam...

In lower-income countries, the economic contractions that accompany lockdowns to contain the spread of COVID-19 can increase child mortality, counteracting the mortality reductions achieved by the lockdown. To formalize and quantify this effect, this paper builds a...

Why is governance in resource-rich countries so poor This paper argues that it is because governments in these countries do not rely on taxation, which is an important instrument for citizens to hold their governments accountable. Using a game-theoretic model, the authors show that the...